test_that("dimensionality selection works", {
withr::local_seed(42)
k <- make_graph("zachary")
ev <- eigen(as_adjacency_matrix(k), only.values = TRUE)$values
kdim <- dim_select(ev)
expect_equal(kdim, 4)
expect_equal(dim_select(1:100), 50)
## Some regression tests
expect_equal(dim_select(runif(100)), 69)
expect_equal(dim_select(runif(100)), 88)
expect_equal(dim_select(runif(100)), 3)
expect_equal(dim_select(runif(100)), 99)
## Some more meaningful tests
x <- c(rnorm(50, mean = 0, sd = 1), rnorm(50, mean = 5, sd = 1))
expect_equal(dim_select(x), 50)
x <- c(rnorm(10, mean = 0, sd = 1), rnorm(90, mean = 2, sd = 1))
expect_equal(dim_select(x), 10)
x <- c(10, rnorm(99, mean = 0, sd = 1))
expect_equal(dim_select(x), 1)
x <- c(rnorm(99, mean = 0, sd = 1), 10)
expect_equal(dim_select(x), 99)
})
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